/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
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   framework to you, and you must discontinue the installation or download
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   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

#include "juce_LV2Common.h"

namespace juce
{

class LV2PluginFormatTests final : public UnitTest
{
public:
    LV2PluginFormatTests()
        : UnitTest ("LV2 Hosting", UnitTestCategories::audioProcessors)
    {
    }

    void runTest() override
    {
        using namespace lv2_shared;

        beginTest ("ChannelMapping for well-ordered stereo buses does no mapping");
        {
            const AudioProcessor::BusesLayout host { { AudioChannelSet::stereo() }, { AudioChannelSet::stereo() } };
            const ParsedBuses client { { ParsedGroup { "a", { SinglePortInfo { 0, AudioChannelSet::left,  false },
                                                              SinglePortInfo { 1, AudioChannelSet::right, false } } } },
                                       { ParsedGroup { "b", { SinglePortInfo { 2, AudioChannelSet::left,  false },
                                                              SinglePortInfo { 3, AudioChannelSet::right, false } } } } };
            const PortToAudioBufferMap map { host, client };

            expect (map.getChannelForPort (0) == 0);
            expect (map.getChannelForPort (1) == 1);

            expect (map.getChannelForPort (2) == 0);
            expect (map.getChannelForPort (3) == 1);

            expect (map.getChannelForPort (4) == -1);
        }

        beginTest ("ChannelMapping for layout with backwards ports is converted to JUCE order");
        {
            const AudioProcessor::BusesLayout host { { AudioChannelSet::stereo() }, { AudioChannelSet::stereo() } };
            const ParsedBuses client { { ParsedGroup { "a", { SinglePortInfo { 0, AudioChannelSet::right, false },
                                                              SinglePortInfo { 1, AudioChannelSet::left,  false } } } },
                                       { ParsedGroup { "b", { SinglePortInfo { 2, AudioChannelSet::right, false },
                                                              SinglePortInfo { 3, AudioChannelSet::left,  false } } } } };
            const PortToAudioBufferMap map { host, client };

            expect (map.getChannelForPort (0) == 1);
            expect (map.getChannelForPort (1) == 0);

            expect (map.getChannelForPort (2) == 1);
            expect (map.getChannelForPort (3) == 0);

            expect (map.getChannelForPort (4) == -1);
        }

        beginTest ("ChannelMapping for layout with multiple buses works as expected");
        {
            const AudioProcessor::BusesLayout host { { AudioChannelSet::create5point1(), AudioChannelSet::mono() },
                                                     { AudioChannelSet::mono(), AudioChannelSet::createLCRS(), AudioChannelSet::stereo() } };
            const ParsedBuses client { { ParsedGroup { "a", { SinglePortInfo {  0, AudioChannelSet::right,         false },
                                                              SinglePortInfo {  1, AudioChannelSet::left,          false },
                                                              SinglePortInfo {  2, AudioChannelSet::LFE,           false },
                                                              SinglePortInfo {  3, AudioChannelSet::centre,        false },
                                                              SinglePortInfo {  4, AudioChannelSet::rightSurround, false },
                                                              SinglePortInfo {  5, AudioChannelSet::leftSurround,  false } } },
                                         ParsedGroup { "b", { SinglePortInfo {  6, AudioChannelSet::centre,        false } } } },
                                       { ParsedGroup { "c", { SinglePortInfo {  7, AudioChannelSet::centre,        false } } },
                                         ParsedGroup { "d", { SinglePortInfo {  8, AudioChannelSet::surround,      false },
                                                              SinglePortInfo {  9, AudioChannelSet::centre,        false },
                                                              SinglePortInfo { 10, AudioChannelSet::right,         false },
                                                              SinglePortInfo { 11, AudioChannelSet::left,          false } } },
                                         ParsedGroup { "e", { SinglePortInfo { 12, AudioChannelSet::left,          false },
                                                              SinglePortInfo { 13, AudioChannelSet::right,         false } } } } };
            const PortToAudioBufferMap map { host, client };

            expect (map.getChannelForPort ( 0) ==  1);
            expect (map.getChannelForPort ( 1) ==  0);
            expect (map.getChannelForPort ( 2) ==  3);
            expect (map.getChannelForPort ( 3) ==  2);
            expect (map.getChannelForPort ( 4) ==  5);
            expect (map.getChannelForPort ( 5) ==  4);
            expect (map.getChannelForPort ( 6) ==  6);

            expect (map.getChannelForPort ( 7) ==  0);
            expect (map.getChannelForPort ( 8) ==  4);
            expect (map.getChannelForPort ( 9) ==  3);
            expect (map.getChannelForPort (10) ==  2);
            expect (map.getChannelForPort (11) ==  1);
            expect (map.getChannelForPort (12) ==  5);
            expect (map.getChannelForPort (13) ==  6);

            expect (map.getChannelForPort (14) == -1);
        }

        beginTest ("Optional client buses may correspond to a disabled host bus");
        {
            const ParsedBuses client { { ParsedGroup { "a", { SinglePortInfo {  0, AudioChannelSet::right,         true },
                                                              SinglePortInfo {  1, AudioChannelSet::left,          true },
                                                              SinglePortInfo {  2, AudioChannelSet::LFE,           true },
                                                              SinglePortInfo {  3, AudioChannelSet::centre,        true },
                                                              SinglePortInfo {  4, AudioChannelSet::rightSurround, true },
                                                              SinglePortInfo {  5, AudioChannelSet::leftSurround,  true } } },
                                         ParsedGroup { "b", { SinglePortInfo {  6, AudioChannelSet::centre,        true } } } },
                                       { ParsedGroup { "c", { SinglePortInfo {  7, AudioChannelSet::centre,        true } } },
                                         ParsedGroup { "d", { SinglePortInfo {  8, AudioChannelSet::surround,      true },
                                                              SinglePortInfo {  9, AudioChannelSet::centre,        true },
                                                              SinglePortInfo { 10, AudioChannelSet::right,         true },
                                                              SinglePortInfo { 11, AudioChannelSet::left,          true } } },
                                         ParsedGroup { "e", { SinglePortInfo { 12, AudioChannelSet::left,          true },
                                                              SinglePortInfo { 13, AudioChannelSet::right,         true } } } } };

            const PortToAudioBufferMap mapA { AudioProcessor::BusesLayout { { AudioChannelSet::disabled(), AudioChannelSet::mono() },
                                                                            { AudioChannelSet::mono(), AudioChannelSet::disabled(), AudioChannelSet::stereo() } },
                                              client };

            expect (mapA.getChannelForPort ( 0) == -1);
            expect (mapA.getChannelForPort ( 1) == -1);
            expect (mapA.getChannelForPort ( 2) == -1);
            expect (mapA.getChannelForPort ( 3) == -1);
            expect (mapA.getChannelForPort ( 4) == -1);
            expect (mapA.getChannelForPort ( 5) == -1);
            expect (mapA.getChannelForPort ( 6) ==  0);

            expect (mapA.getChannelForPort ( 7) ==  0);
            expect (mapA.getChannelForPort ( 8) == -1);
            expect (mapA.getChannelForPort ( 9) == -1);
            expect (mapA.getChannelForPort (10) == -1);
            expect (mapA.getChannelForPort (11) == -1);
            expect (mapA.getChannelForPort (12) ==  1);
            expect (mapA.getChannelForPort (13) ==  2);

            expect (mapA.getChannelForPort (14) == -1);

            const PortToAudioBufferMap mapB { AudioProcessor::BusesLayout { { AudioChannelSet::create5point1(), AudioChannelSet::disabled() },
                                                                            { AudioChannelSet::disabled(), AudioChannelSet::disabled(), AudioChannelSet::stereo() } },
                                              client };

            expect (mapB.getChannelForPort ( 0) ==  1);
            expect (mapB.getChannelForPort ( 1) ==  0);
            expect (mapB.getChannelForPort ( 2) ==  3);
            expect (mapB.getChannelForPort ( 3) ==  2);
            expect (mapB.getChannelForPort ( 4) ==  5);
            expect (mapB.getChannelForPort ( 5) ==  4);
            expect (mapB.getChannelForPort ( 6) == -1);

            expect (mapB.getChannelForPort ( 7) == -1);
            expect (mapB.getChannelForPort ( 8) == -1);
            expect (mapB.getChannelForPort ( 9) == -1);
            expect (mapB.getChannelForPort (10) == -1);
            expect (mapB.getChannelForPort (11) == -1);
            expect (mapB.getChannelForPort (12) ==  0);
            expect (mapB.getChannelForPort (13) ==  1);

            expect (mapB.getChannelForPort (14) == -1);
        }

        beginTest ("A plugin with only grouped ports will have the same number of buses as groups");
        {
            const auto parsed = findStableBusOrder ("foo",
                                                    { { "sidechain", { SinglePortInfo { 0, AudioChannelSet::left,   false },
                                                                       SinglePortInfo { 1, AudioChannelSet::right,  false } } },
                                                      { "foo",       { SinglePortInfo { 2, AudioChannelSet::centre, false } } } },
                                                    {});
            expect (parsed.size() == 2);

            expect (parsed[0].uid == "foo");       // The main bus should always be first
            expect (parsed[0].info.size() == 1);

            expect (parsed[1].uid == "sidechain");
            expect (parsed[1].info.size() == 2);
        }

        beginTest ("A plugin with grouped and ungrouped ports will add a bus for each ungrouped port");
        {
            const auto parsed = findStableBusOrder ("foo",
                                                    { { "sidechain", { SinglePortInfo { 0, AudioChannelSet::left,   false },
                                                                       SinglePortInfo { 1, AudioChannelSet::right,  false } } },
                                                      { "foo",       { SinglePortInfo { 2, AudioChannelSet::centre, false } } } },
                                                    { SinglePortInfo { 3, AudioChannelSet::leftSurround,  false },
                                                      SinglePortInfo { 4, AudioChannelSet::centre,        true },
                                                      SinglePortInfo { 5, AudioChannelSet::rightSurround, false } });
            expect (parsed.size() == 5);

            expect (parsed[0].uid == "foo");       // The main bus should always be first
            expect (parsed[0].info.size() == 1);

            expect (parsed[1].uid == "sidechain");
            expect (parsed[1].info.size() == 2);

            expect (parsed[2].uid == "");
            expect (parsed[2].info.size() == 1);

            expect (parsed[3].uid == "");
            expect (parsed[3].info.size() == 1);

            expect (parsed[4].uid == "");
            expect (parsed[4].info.size() == 1);
        }

        beginTest ("A plugin with only ungrouped, required ports will have a single bus");
        {
            const auto parsed = findStableBusOrder ("foo",
                                                    {},
                                                    { SinglePortInfo { 0, AudioChannelSet::leftSurround,  false },
                                                      SinglePortInfo { 1, AudioChannelSet::rightSurround, false },
                                                      SinglePortInfo { 2, AudioChannelSet::left,          false },
                                                      SinglePortInfo { 3, AudioChannelSet::right,         false } });

            expect (parsed == std::vector<ParsedGroup> { { "", { SinglePortInfo { 0, AudioChannelSet::leftSurround,  false },
                                                                 SinglePortInfo { 1, AudioChannelSet::rightSurround, false },
                                                                 SinglePortInfo { 2, AudioChannelSet::left,          false },
                                                                 SinglePortInfo { 3, AudioChannelSet::right,         false } } } });
        }

        beginTest ("A plugin with only ungrouped, optional ports will have a bus per port");
        {
            const auto parsed = findStableBusOrder ("foo",
                                                    {},
                                                    { SinglePortInfo { 0, AudioChannelSet::leftSurround,  true },
                                                      SinglePortInfo { 1, AudioChannelSet::rightSurround, true },
                                                      SinglePortInfo { 2, AudioChannelSet::left,          true },
                                                      SinglePortInfo { 3, AudioChannelSet::right,         true } });

            expect (parsed == std::vector<ParsedGroup> { { "", { SinglePortInfo { 0, AudioChannelSet::leftSurround,  true } } },
                                                         { "", { SinglePortInfo { 1, AudioChannelSet::rightSurround, true } } },
                                                         { "", { SinglePortInfo { 2, AudioChannelSet::left,          true } } },
                                                         { "", { SinglePortInfo { 3, AudioChannelSet::right,         true } } } });
        }

        beginTest ("A plugin with a mix of required and optional ports will have the required ports grouped together on a single bus");
        {
            const auto parsed = findStableBusOrder ("foo",
                                                    {},
                                                    { SinglePortInfo { 0, AudioChannelSet::leftSurround,  true },
                                                      SinglePortInfo { 1, AudioChannelSet::rightSurround, false },
                                                      SinglePortInfo { 2, AudioChannelSet::left,          true },
                                                      SinglePortInfo { 3, AudioChannelSet::right,         false } });

            expect (parsed == std::vector<ParsedGroup> { { "", { SinglePortInfo { 1, AudioChannelSet::rightSurround, false },
                                                                 SinglePortInfo { 3, AudioChannelSet::right,         false } } },
                                                         { "", { SinglePortInfo { 0, AudioChannelSet::leftSurround,  true } } },
                                                         { "", { SinglePortInfo { 2, AudioChannelSet::left,          true } } } });
        }
    }
};

static LV2PluginFormatTests lv2PluginFormatTests;

} // namespace juce
